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Home / NCIDQ Glossary / illuminance

illuminance

Updated: October 7, 2018 by Lisa League

Illuminance defines the luminous flux that is received per unit area of a surface. Its unit is measured in lumens per square meter, lm/m² or lux.

More simply put – it is a measure of the amount of light hitting a surface. Don't confuse this with luminance.

Illuminance definition

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